Sync with rev 642 change. Remove existence attribute.
Sync with rev 642 change.
Remove existence attribute.

(wc_entry_existence): Removed.

(svn_ruby_init_wc): Remove Svn::WcEntry::EXISTENCE_NORMAL,
  Svn::WcEntry::EXISTENCE_ADDED and Svn::WcEntry::EXISTENCE_DELETED.
  Remove Svn::WcEntry::ATTR_EXISTENCE, Svn::WcEntry#existence.



git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@840737 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion